1package binary 2 3import ( 4 "encoding/binary" 5 "io" 6) 7 8// Write writes the binary representation of data into w, using BigEndian order 9// https://golang.org/pkg/encoding/binary/#Write 10func Write(w io.Writer, data ...interface{}) error { 11 for _, v := range data { 12 if err := binary.Write(w, binary.BigEndian, v); err != nil { 13 return err 14 } 15 } 16 17 return nil 18} 19 20func WriteVariableWidthInt(w io.Writer, n int64) error { 21 buf := []byte{byte(n & 0x7f)} 22 n >>= 7 23 for n != 0 { 24 n-- 25 buf = append([]byte{0x80 | (byte(n & 0x7f))}, buf...) 26 n >>= 7 27 } 28 29 _, err := w.Write(buf) 30 31 return err 32} 33 34// WriteUint64 writes the binary representation of a uint64 into w, in BigEndian 35// order 36func WriteUint64(w io.Writer, value uint64) error { 37 return binary.Write(w, binary.BigEndian, value) 38} 39 40// WriteUint32 writes the binary representation of a uint32 into w, in BigEndian 41// order 42func WriteUint32(w io.Writer, value uint32) error { 43 return binary.Write(w, binary.BigEndian, value) 44} 45 46// WriteUint16 writes the binary representation of a uint16 into w, in BigEndian 47// order 48func WriteUint16(w io.Writer, value uint16) error { 49 return binary.Write(w, binary.BigEndian, value) 50} 51